Drag the images below into boxes to indicate the correct order of events illustrating the mechanism of action of an a-b exotoxin.
Answers
The mechanism of action of an A-B exotoxin involves two components, i.e., an A domain and a B domain, which help in the attachment and the entry of the toxin into the host cell. The B domain of the exotoxin attaches to the specific receptor site present on the host cell surface, which is followed by the internalization of the toxin into the cell by the process of receptor-mediated endocytosis.
The A domain of the exotoxin then cleaves off from the B domain and enters into the cytoplasm of the host cell.The A domain then interferes with the cellular functions of the host cell by either inhibiting the protein synthesis or disrupting the cytoplasmic membrane, leading to the death of the host cell.
Therefore, the mechanism of action of an A-B exotoxin involves the attachment of the B domain to the host cell, entry into the host cell, cleavage of the A domain from the B domain, and interference with the cellular functions of the host cell, leading to the cell death.
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Related Questions
if maria runs at a speed of 2 m/s, how far will she run in 60 seconds
Answers
Answer:
The answer is 120 mExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = speed × timeFrom the question
speed = 2 m/s
time = 60 s
We have
distance = 2 × 60
We have the final answer as
120 mHope this helps you
Most of the energy released in citric acid cycle reactions is conserved in ________.
Answers
The majority of the energy released in citric acid cycle reactions is conserved in the form of adenosine triphosphate (ATP).
What is citric acid cycle?
The Krebs cycle, also referred to as the TCA cycle or the citric acid cycle (CAC), is a set of chemical reactions that releases stored energy by oxidising acetyl-CoA, which is inferred from carbohydrates, fats, as well as proteins. Organisms a certain respire (as compared to organisms a certain ferment) use the Krebs cycle to produce energy, either through anaerobic or aerobic respiration. The cycle additionally supplies the reducing agent NADH and precursors of a few amino acids that are needed in a variety of other reactions. It may have originated abiogenically and became one of the earliest elements of metabolism given its central role in many biochemical pathways.
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What is milk an example of?
O solution
O colloid
O suspension
O compound
Answers
Milk is an example of a colloid (option B).
What is a colloid?A colloid is an intimate mixture of two substances, one of which, called the dispersed phase.
A colloid is uniformly distributed in a finely divided state throughout the second substance, called the dispersion medium (or dispersing medium).
Milk is an example of a colloidal solution, where fat is the phase and water is the medium.
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in 400 bce, the greek philosopher democritus first proposed the idea that all matter was composed of atoms. since that time, scientists have learned that, far from resembling tiny marbles, atoms actually have very complex structures. since it has been changed so many times, why is it referred to as the atomic theory rather than the atomic hypothesis?
Answers
The term "atomic theory" is used instead of "atomic hypothesis" because it signifies the evolution and acceptance of the concept over time.
While Democritus initially proposed the idea of atoms in 400 BCE, it was merely a hypothesis without substantial experimental evidence. Over centuries, scientific investigations and advancements led to a deeper understanding of atomic structure and behavior.
The term "atomic theory" acknowledges that the concept of atoms has undergone refinement and modification based on experimental evidence and theoretical developments.
It recognizes that the understanding of atoms has evolved from a speculative hypothesis to a well-established scientific theory supported by extensive experimental observations, mathematical models, and empirical data.
The term "theory" conveys the comprehensive and validated nature of our understanding of atoms, encompassing their complex structures and behavior.
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what influences climate and extreme weather?
Answers
Answer:
CLIMATE :::
Climate change affects global temperature and precipitation patterns. These effects, in turn, influence the intensity and, in some cases, the frequency of extreme environmental events, such as forest fires, hurricanes, heat waves, floods, droughts, and storms.
EXTREME WEATHER :::
Too much rain (heavy downpours), causes floods and landslides. Too much heat and no rain (heatwave) drought and wildfires. Strong winds, such as hurricanes and tornadoes = damage to man made structures and animal habitats.
Explanation:
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Which of the following sets of quantum numbers represents the last electron added to an arsenic atom (As)? n=4, l=2,m=0n=3, l=2, m=0n=3, l=1, m=0n=4, l=1, m=2n=4, l=1, m=0
Answers
The set of quantum numbers that represents the last electron added to an arsenic atom (As) is n=4, l=1, m=2.
An electron is a negatively charged particle that orbits the atomic nucleus in the atom's outermost shell. The electron contains practically no mass but has a charge of -1.
Quantum numbers help to explain and comprehend the structure of electrons. An electron is described by four quantum numbers, which give it a unique identification in a given atom's electronic configuration.
The sets of quantum numbers are: n, l, m, and s. Where n represents the principle quantum number, l is the angular momentum quantum number, m represents the magnetic quantum number, and s is the spin quantum number.
In the case of the last electron added to an arsenic atom (As), the set of quantum numbers that represents it is n=4, l=1, m=2. This is because the last electron added will fill in the outermost shell of the atom.
Therefore, the principle quantum number (n) is equal to 4 because the valence shell is in the fourth shell. l, which is the angular momentum quantum number, is equal to 1 because it is the valence shell's subshell.
Finally, m, the magnetic quantum number, is equal to 2 because of the orientation of the orbital in which the electron is present. As a result, the answer is n=4, l=1, m=2.
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an atom of which of the following elements can form the most bonds?
a. phosphorus
b. sodium
c. oxygen
d.oxygen
Answers
A.phosphorus
:)
The amount of chlorine in the city water supply should not exceed 4mg per liter. To understand whether the level of chlorine is tolerable 7 samples are taken. The measurements yield the following values for the chlorine level:
4.12
4.30
3.82
4.19
3.72
3.86
4.13
(a) (1 point) Compute the sample mean
x
ˉ
. (b) (3 points (bonus)) Compute the sample standard deviation s. \begin{tabular}{|c|r|c|c|c|} \hline 0.317945 &
0.217945
& 0.197945 & 0.367945 & 0.287945 \\ 0.427945 & 0.137945 & 0.097945 & 0.247945 & 0.347945 \\ \hline \end{tabular} (c) (3 points) Let the null hypothesis be H
0
:μ=4 (and hence the alternative hypothesis is H
1
:μ>4 ). Compute the P-value. \begin{tabular}{l|l|l|c|} 0.3971 & 0.4230 & 0.4118 & 0.4193 \\ 0.4044 & 0.4007 & 0.4155 & ✓0.4081 \end{tabular} (d) (1 point) What conclusion should we make? (No explanation is required.) P-value is significant and we accept the null hypothesis. P-value is not significant and we reject the null hypothesis. P-value is significant and we reject the null hypothesis. P-value is not significant and we do not reject the null hypothesis. P-value is significant and we accept the alternative hypothesis. P-value is not significant and we accept the alternative hypothesis. P-value is significant and we reject the alternative hypothesis.
Answers
(a) Sample Mean, x ˉx ˉ = 4.04
(b) Sample standard deviation, ss = 0.2001
(c) The null hypothesis is H0: μ = 4 and alternative hypothesis is H1: μ > 4.
The test statistic is given as:
t=4.04−44.04/0.2001/√7
=0.56
The degree of freedom for the t-distribution is 6 (n-1=7-1=6)
P-value=P(T>t)
=P(T>0.56)
=0.2973
≈0.30
(d) Since P-value is not significant and we do not reject the null hypothesis.
Therefore, we conclude that we have no sufficient evidence to prove that the mean amount of chlorine in the city water supply is greater than 4mg/L and hence the city water supply is tolerable.
So, the correct answer is P-value is not significant and we do not reject the null hypothesis.
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What is the chemical formula for fluoride?
Answers
Answer:b
Explanation:
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6. A food supply company produces Yellow-42 (from previous example) in 200-gram wholesale bottles. How many grams of FeCl3 would be needed to produce one bottle of Yellow 42?
7. How much NaOH would be needed to produce one bottle of Yellow 42?
8. Iron (III) chloride is fairly expensive, and the company does not want to waste any during the reaction process. How could the company set up this reaction in a way that ensures no iron (III) chloride is wasted in the reaction?
Answers
A food supply company produces Yellow-42 (from previous example) in 200-gram wholesale bottles. The grams of FeCl3 needed to produce one bottle of Yellow 42 is 303.638 grams. The amount of NaOH needed to produce one bottle of Yellow 42 is 226.32 grams.
The mass amount of Yellow 42 = 200 gramsThe molar mass of Fe(OH)3 needed to produce 1 bottle of Yellow 42 = 106.845 g/mol
∴
Using the relation for the number of moles which is:
\(\mathbf{number \ of \ moles = \dfrac{mass }{molar \ mass}}\)
\(\mathbf{number \ of \ moles \ of \ Yellow \ 42 = \dfrac{200 g }{106.867 \ g/mol}}\)
\(\mathbf{number \ of \ moles \ of \ Yellow \ 42 =1.872 \ moles}\)
Now,
If 1 mole of Fe(OH)₃ requires 1 mole of FeCl₃1.872 moles of Fe(OH)₃ will require 1.872 moles of FeCl₃∴
Mass of FeCl₃ required = number of moles of FeCl₃ × molar mass of FeCl₃
Mass of FeCl₃ required = 1.872 moles × 162.2 g/mol
Mass of FeCl₃ required = 303.638 grams
7.
Recall that:
1 bottle of the yellow requires 1.872 moles of the Fe(OH)₃Thus, 1 mole of Fe(OH)₃ requires 3 moles of NaOHNow, 1.872 moles of Fe(OH)₃ will require (3 × 1.872 moles of NaOH)
= 5.616 moles of NaOH
Thus, the amount of NaOH in grams, that will be needed to produce one bottle of Yellow 42 is:
= 5.616 moles × 40.3 g/mol (molar mass of NaOH)
= 226.32 grams of NaOH
8.
The company could set up this reaction in a way that ensures no iron (III) chloride is wasted in the reaction by using the concept of the stoichiometry of the reaction involved in the system and he should feed the reactant within the ratio of 1:3 for FeCl₃ and NaOH respectively.
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En una planta de energía, se produce CO2 gracias a la reacción de combustión del material orgánico con oxígeno para producir CO2, SO2, SO3, NO, NO2 y H2O que son los causantes del efecto invernadero, el SO2 reacciona con H2O para formar H2SO3, causante de la lluvia ácida. En condiciones de gas ideal el SO2 se encuentra a una temperatura de 100°C y 0,5 atm de presión, el volumen ocupado generalmente es de 25 L. 5. La ecuación para hallar el número de moles debe ser: a. Gases ideales: relación entre todas las variables que influyen sobre los gases b. Boyle: relación entre volumen y presión c. Charles: relación entre el volumen y la temperatura d. Gay Lussac: relación entre la presión y la temperatura
Answers
Answer:
a. Gases ideales: relación entre todas las variables que influyen sobre los gases
Explanation:
La ecuación del gas ideal da la relación entre las variables; presión, volumen, temperatura y número de moles.
Según la ecuación del gas ideal; PV = nRT
P = presión del gas
V = volumen del gas
n = Número de moles del gas
R = constante de gas
T = temperatura del gas
El número de moles de SO2 se obtiene de;
n = PV / RT
n = 0,5 * 25 / 0,082 * 373
n = 12,5 / 30,586
n = 0,41 moles
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The table shows the number of reactants and products present during two separate chemical reaction
Which of the following statements correctly identifies the decomposition reaction and describes a substance involved?
Chemical reaction A, because the reactant is a compound
Chemical reaction B, because the product is a compound
Chemical reaction A, because the reactant is an element
Chemical reaction B, because the product is an element
Answers
Answer:
Chemical reaction A, because the reactant is a compound
Explanation:
In a decomposition reaction, a compound is broken down into its components, so the number of products is greater than the number of reactants
Chemical reaction A, because the reactant is a compound is a statements correctly identifies the decomposition reaction and describes a substance involved.
What is chemical reaction?When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.
Although a chemical reaction is not always a "one-way street," as we'll examine further in the next section, an arrow is drawn between the reactants and products to denote the direction of the reaction.
Our equation must have them in it in order for there to be an equal number of atoms of each element on both sides of the equation.
Therefore, Chemical reaction A, because the reactant is a compound is a statements correctly identifies the decomposition reaction and describes a substance involved.
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in which each of Earth’s subsystems was altered during the Precambrian era.
Answers
Answer:The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.
The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.
At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.
Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.
Explanation:i hope this helps! :)
Answer:
The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.
The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.
At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.
Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.
Explanation:
A compound forms between cesium cation and carbonate anion. Select all statements that are true.
a. The chemical formula of the compound is Cs(C)3)2
b. This compound only contains ionic bonds.
c. The most stable form of a cesium ion has a charge of 1+.
d. The compound is an ionic compound.
Answers
A compound forms between cesium cation and carbonate anion Cs₂CO₃ is ionic compound. (B)
This creates an ion with a 1+ charge (Cs⁺). Carbonate is a polyatomic ion made up of carbon and oxygen atoms. It is a negative ion that has a charge of 2-.
The Cs+ ion reacts with the CO₃²⁻ ion to form an ionic bond. The Cs+ ion donates an electron to the CO₃²⁻ ion, resulting in the formation of the Cs₂CO₃ compound. Only ionic bonds exist in Cs₂CO₃. Cs₂CO₃ is a purely ionic compound with ionic bonds between cesium ions and carbonate ions.
Because cesium is a metal, it tends to lose an electron, while the carbonate ion tends to gain two electrons.
Due to the exchange of electrons, ionic bonds are formed.Option c: The most stable form of a cesium ion has a charge of 1+:The most stable form of cesium ion has a charge of 1+. This is because cesium has only one valence electron. To get a full outer shell, it is preferable to lose this one valence electron.
So, when Cs+ loses an electron, it forms a cation with a 1+ charge.Option d: The compound is an ionic compound:Cesium carbonate is an inorganic compound that is ionic in nature.
so ,this compound only contains ionic bonds Cs⁺ (cesium cation) is a metal with a strong tendency to lose an electron. Cesium has only one valence electron, so it is easy to lose one electron and get a full outer shell. (B)
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Acids such as HNO3, or H2SO4, which contain oxygen,
hydrogen and other elements are called
Answers
Answer:
oxoacids
Explanation:
Acids such as HNO3, H2SO4, which contain oxygen, hydrogen, and other elements are called oxoacids
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15. Scientists may design an experiment with a control group, which is a set of organisms or samples that do NOT receive the treatment (the independent variable) that is being tested. Scientists
can then compare normal changes in organisms or samples with those that might have occurred
because of the treatment. The idea of a "control group" is not the same as a "controlled variable."
Suppose a scientist is doing an experiment to determine the effect of a cancer drug on mice with
lymphoma.
a. What are some of the variables the scientist should control in the experiment?
b. Describe the control group for this experiment.
This is what I have so far, but I could be wrong.
Answers
a) A control variable would be the same species of the rat that were used in the entire experiment.
b) A control group is the group of rat that do not have lymphoma.
What is control variable?
The control variable is a group which is unchanged or constant throughout the experiment. They may include temperature, humidity, pressure, experimental techniques, sample volume etc.
In an experiment control variable is the variable which must be kept constant throughout the experiment to keep the outcome of the experiment unaltered. The control group is the one that don't receive the treatment while being tested in an experiment.
Therefore, a control variable would be the same species of the rat used in the entire experiment and control variables are the one which do not have a lymphoma.
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The energy required to raise the temperature of 1 kg of water by 1°C is what?
Answers
Answer:
Specific heat capacity
help 6th grade science i will give brainliest FOOLISH ANSWERS WILL BE REPORTED
Answers
Answer: my answer would be B
Explanation: if you look at the graph and see the distance and time, you can match it to one of the answers. Hope this helps
fertilizer is sold in 100 pound bags labelled with the amount of nitrogen ( n), phosphoric acid ( p2o5), and potash ( k2o) present. the mixture of these nutrients varies from one type of fertilizer to the next. for example, a pound bag of vigoro ultra turf fertilizer contains pounds of nitrogen, pounds of phosphoric acid, and pounds of potash. another type of fertilizer, parker’s premium starter, has pounds of nitrogen, pounds of phosphoric acid, and pounds of potash per pounds. determine the amount of each type required to yield a mixture containing the pounds of nitrogen, pounds of phosphoric acid, and pounds of potash.
Answers
The amount of each type required to yield a mixture containing the pounds of nitrogen, pounds of phosphoric acid, and pounds of potash is y = 5 bags, x = 3 bags.
What are fertilizers?Fertilizers are any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients.
177 pounds = 29x + 18y (1)
Where x is bags of Vigor Ultra Turf fertilizer and y are bags of Parkers Premium Starte-
For P₂O₅:
134 pounds = 3x + 25y (2)
For K₂O:
42 pounds = 4x + 6y (3)
Replacing (1) in (2):
134 = (531/29 - 54y/29) + 25y
3355/29 = 671y/29
Thus, y = 5 bags, x = 3 bags.
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What Period would this element be in?
Answers
Answer:
Period 2
Explanation:
From the picture provided, I am guessing this is Fluorine. Normal Fluorine has 9 protons, electrons, and atomic number. Thus, it can be found in the second period.
***Period # = # of electron shells
What is Ghez’s favorite star? Do you have a favorite star? Why or why not?
Answers
Andrea Ghez's favorite star is known as SO-2 and it is her favorite star because this star goes around the universe in a short period. I do not have a favorite star because I do not know a lot about stars.
Who is Andrea Ghez?Andrea Ghez is female astrophysicst who was born in the United States known for being one of the few women in the world who have gotten the Nobel Prize in Physics. During her life, Andrea has studied the center of the universe, black holes and the stars. Moreover, she was known for giving a TED talk in whiich she explained about stars and black holes.
What is Andrea's favorite start?In the TED talk given by Andrea Ghez she mentions her favorite star is the SO-2 as "it goes around in only 15 years".
What is my favorite star?I do not have a favorite star because I do not know a lot about stars, although I believe studying them is very interesting.
Note: This question is incomplete; here is the missin information:
TED Talk- Andrea Ghez
"Now, most astronomers have a favorite star, and mine today is a star that's labeled up there, SO-2. Absolutely my favorite star in the world. And that's because it goes around in only 15 years. And to give you a sense of how short that is, the sun takes 200 million years to go around the center of the galaxy"
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According to your results, list the solids tested in order of increasing polarity- starting with the least polar and finishing with the most polar. Explain how you arrived at you conclusions.
The solids are: NaCl, NH2CONH2 (Urea), C6H5COOH (Benzoic Acid), and C10H8 (naphthalene).
They were tested using solvents hexane(least polar), toluene, THF, ethyl acetate, ethyl alcohol, and water (most polar).
Answers
The solids can be listed in order of increasing polarity as follows: C10H8 (naphthalene), C6H5COOH (benzoic acid), NH2CONH2 (urea), and NaCl.
To arrive at this conclusion, the solubility of each solid was observed in different solvents with varying polarities. Since "like dissolves like," the solubility of a solid in a solvent reflects their similar polarities.
1. Naphthalene (C10H8) is least polar because it is mainly soluble in non-polar solvents like hexane and toluene. This is due to its non-polar structure, consisting of two fused benzene rings.
2. Benzoic acid (C6H5COOH) has moderate polarity because it contains a polar carboxylic acid group (-COOH) and a non-polar benzene ring. It dissolves in moderately polar solvents such as ethyl acetate and toluene.
3. Urea (NH2CONH2) is more polar than benzoic acid, as it contains polar N-H bonds and a carbonyl group (C=O). It dissolves in polar solvents like ethyl alcohol and THF.
4. Sodium chloride (NaCl) is the most polar solid due to its ionic nature. It is soluble in highly polar solvents like water but insoluble in non-polar solvents like hexane.
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what is krcl4 lewis structure
Answers
Answer: I hope this helpful
Explanation:
The lewis structure of KrCl4 describes that the central atom is Kr and 4 chlorine (Cl) atoms are attached by a single bond that is, Kr-Cl. There are two lone pairs of electrons present on the central atom that is, Kr and each chlorine (Cl) atom have three lone pairs of electrons on it.KrCl4 lewis structure has Krypton atom (Kr) at the center which is surrounded by four Chlorine atoms (Cl). There are 4 single bonds between the Krypton atom (Kr) and each Chlorine atom (Cl). There are 2 lone pairs on the Krypton atom (Kr) and 3 lone pairs on all the four Chlorine atoms (Cl).
In lewis structure of KrCl₄, there are four single bonds between the Krypton atom (Kr) and each Chlorine atom (Cl). There are two lone pairs on the Krypton atom (Kr) and three lone pairs on all the four Chlorine atoms.
What is lewis structure ?Lewis structures are diagrams that show the valence electrons of atoms within a molecule. The valence electrons of atoms and molecules, whether they reside as lone pairs or inside bonds, may be seen using these Lewis symbols and structures.
According to the Lewis structure of KrCl₄, the central atom Kr atom is joined to four chlorine (Cl) atoms by a single link, which is Kr-Cl. The core element, Kr, has two lone pairs of electrons, while the chlorine (Cl) atoms each contain three lone pairs of electrons.
Each Chlorine atom and the Krypton atom (Kr) are connected by four single bonds (Cl). The Krypton atom (Kr) has two lone pairs, while all four Chlorine atoms have three lone pairs (Cl).
Thus, Lewis structure KrCl₄ features four Chlorine atoms surrounding the Krypton atom (Kr) at its central atom (Cl).
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That's just the tip of the iceberg" is a popular expression you may have heard. It means that what you can see is only a small part of the overall problem. As the diagram shows, most of an iceberg is actually out of sight, below the water level. Based on this diagram, what is the most likely density of the iceberg? (Assume a density of 1.03 g/mL for seawater.)
A. 0.88 g/cc
B. 1.23 g/cc
C. 0.23 g/cc
D. 4.14 g/cc
Answers
B 1.23 g/cc
Explanation:
For something to float on seawater, the density must be less than 1.03 g/mL. If the object sinks, the density is greater than 1.03 g/mL.
Let’s examine the answer choices. Keep in mind, the ice berg is mostly below the water level.
A. 0.88 g/cc
This is less than 1.03 g/cc, which would result in floating.
B. 1.23 g/cc
This is the best answer choice. The iceberg is mostly beneath the water, but some of it is exposed. The density is greater than 1.03 g/mL, but not so much greater that it would immediately sink.
C. 0.23 g/cc
This is less than 1.03 g/cc, which would produce floating.
D. 4.14 g/cc
This is much greater than 1.03 g/cc and the result would be sinking.
Molecular mass of Cl 2 =2×Molecular mass of Cl =2×17.5 u =35.5u
Answers
Molecular mass, also known as molecular weight, refers to the total mass of all atoms in a molecule. It is an important concept in chemistry and is commonly used in various calculations and to predict the behavior of substances.
The molecular mass of chlorine (Cl) is 17.5 u (unified atomic mass units). This means that the mass of one molecule of chlorine is equal to 17.5 atomic mass units.
When two chlorine atoms come together to form a diatomic molecule, Cl2, the molecular mass of Cl2 would be equal to two times the molecular mass of Cl. Hence, the molecular mass of Cl2 is 2 * 17.5 u = 35.5 u. This means that the total mass of two chlorine atoms in a Cl2 molecule is 35.5 atomic mass units.
It is important to note that the molecular mass of a substance is different from its atomic mass. The atomic mass of an element is the average of all the isotopes of that element, whereas the molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of that substance.
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a radioactive substance has a continuous decay rate of 0.056 per minute. how many grams of a 120 gram sample will remain radioactive after 40 minutes? round the answer to the nearest tenth of a gram, and do not include the unit in your answer. note: the formula for radioactive substance is w
Answers
The answer to the question is that radioactive substance has the formula w. The radioactive sample weighs 12.8 g after 40 minutes. A radioactive substance decays continuously.
What type of radioactive is present in human body?
The following natural radionuclides are the most significant ones present in the human body: 238 U, 234 U, 232 Th, 210 Po, 210 Pb, 40 K, 226 Ra, 228 Ra, 14 C, 7 Be, and 22 Na, the last three of which are cosmogenic in origin.
What is the main radiation source in your house?
If radon gas is allowed to build up in a home, it can be harmful to homeowners in addition to uranium miners. It exposes them to the most natural radiation, on average
Briefing:
The mass of the sample can be found by using the exponential decay equation
N(t): is the amount of the sample at time t =?
N₀: is the initial quantity of the sample = 120 g
t = 40 min
λ: is the decay constant = 0.056 min⁻¹
Hence, the mass of the sample after 40 min is:
Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.
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A) potetial energy to chemical
B) chemical energy to thermal
C) Thermal energy to kinetic
D) kinetic energy to potential
Answers
Answer:
most probably potential energy to chemical energy
A
Explanation:
Based on its location on the periodic table, what group does Strontium belong to?
Answers
Answer:
alkaline earth metals
Explanation:
Answer:
Group 2
Explanation:
Strontium (Sr), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table.
Hope this helps
the amount of thermal energy requires to raise temperature of one kilogram of a substance by 1 C is known as
Answers
carlos is preparing to take a comprehensive final exam in his chemistry course. this exam is an example of a(n)
Answers
In this example, the exam, Carlos concerns, and his behavior may be seen as an example of eustress.
What is stress?Stress is a normal physiological and psychological reaction that people have in response to their surroundings. Eustress refers to positive, motivating stress that improves functioning, whereas distress refers to negative, overwhelming stress that impairs functioning.
Eustress refers to positive stress, which can be psychological, physical, or biochemical/radiological. Endocrinologist Hans Selye coined the term, which combines the Greek prefix eu-, which means "good," and stress, which literally means "good stress." Eustress refers to beneficial stress, which can be psychological, physical, or biochemical/radiological in nature.
Since Carlos has a comprehensive final exam in three weeks that he is concerned about and this made him to go ahead and start studying, this is eustress.
Exhilarating rides, competition, and a good scary movie are all examples of Eustress.
Learn more about eustress on;
https://brainly.com/question/999222
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Complete question
Carlos has a comprehensive final exam in three weeks that he is concerned about. His concerns prompt him to go ahead and start studying and in doing so, he feels less worried as the exam approaches. In this example, the exam, Carlos concerns, and his behavior may be seen as an example of ?